Crowns are full coverage restorations that are used to cover a tooth that is likely to break or is too damaged to be corrected with a traditional filling. Some call it a cap or a helmet or a shield for your tooth.
A dental crown is a tooth-shaped "cap" that is placed over a tooth -- to cover the tooth to restore its shape and size, strength, and improve its appearance.The crowns, when cemented into place, fully encase the entire visible portion of a tooth that lies at and above the gum line.
A crown is basically a cap for a damaged tooth. It can be made from a variety of materials, including metal or porcelain.